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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_RUNTIME_SIRT_REF_H_
#define ART_RUNTIME_SIRT_REF_H_
#include "base/casts.h"
#include "base/logging.h"
#include "base/macros.h"
#include "thread.h"
namespace art {
template<class T>
class SirtRef {
public:
SirtRef(Thread* self, T* object) : self_(self), sirt_(object) {
self_->PushSirt(&sirt_);
}
~SirtRef() {
StackIndirectReferenceTable* top_sirt = self_->PopSirt();
DCHECK_EQ(top_sirt, &sirt_);
}
T& operator*() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
return *get();
}
T* operator->() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
return get();
}
T* get() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
return down_cast<T*>(sirt_.GetReference(0));
}
void reset(T* object = nullptr) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
sirt_.SetReference(0, object);
}
private:
Thread* const self_;
StackIndirectReferenceTable sirt_;
DISALLOW_COPY_AND_ASSIGN(SirtRef);
};
} // namespace art
#endif // ART_RUNTIME_SIRT_REF_H_
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